Function assessCacheability

assessCacheability(input: CacheabilityInput): readonly CacheRefusal[]
Lists every reason the edge cache would refuse this response.

Exported because it is the one honest way to ask "would the edge cache this?" without attempting a write and catching the rejection.

The 206 and Vary: * checks are unconditional, evaluated independently of cacheableStatuses: an operator can legitimately configure [200, 206], at which point the status check passes and only the explicit 206 rule stops the platform from throwing.
Parameters
- input: CacheabilityInput
  The request method, response status, headers, and the caller's cacheable-status set
Returns readonly CacheRefusal[]
Every refusal that applies; empty when the response is cacheable
Example
```
const refusals = assessCacheability({
  method: 'GET',
  status: 200,
  headers: new Headers({ 'set-cookie': 'a=1' }),
  cacheableStatuses: [200],
});
// → ['set-cookie']
```
Since
0.2.0
- Defined in packages/cloudflare-plugin/src/cache-api/cacheability.ts:72